JPS6244742Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a pulverized coal granulation device.

Generally, when coal is transported to storage by slurry transport, the coal used for slurry transport is pulverized coal with a relatively wide particle size range in terms of transportation power and crushing. Although this type of pulverized coal is convenient for transportation, it segregates when it sinks in storage, resulting in a decrease in dehydration efficiency when dehydrating pulverized coal, or a bridging phenomenon when taking pulverized coal out of storage. There was a problem. It has been found that a method for solving these problems is to granulate slurry-like powdered coal. However, the particle size range of powdered coal is wide, and it is difficult to granulate powdered coal with a wide particle size range while dispersing a binder using existing granulation equipment such as line mixers.

Therefore, the present invention was made to solve the above problems, and its purpose is to provide an apparatus for efficiently granulating slurry powdered coal.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2. Reference numeral 1 indicates a pipe forming a passage for transporting slurry powdered coal. Reference numeral 2 denotes a shaft body, which is provided within the straight section 1a of the small section of the tube 1 and aligned with the axis of the tube 1, and one end of which is rotatable to the outer side 1b of one end corner of the straight section 1a. The other end rotatably and liquid-tightly penetrates the other end corner outside portion 1c of the straight portion 1a, and is connected to a drive device (not shown). Reference numeral 3 designates wire-mesh-like stirring blades, which are provided at multiple locations on the shaft body 2 . Further, a gap a is provided between the outer peripheral end of the stirring blade 3 and the inner surface of the tube 1.

According to the above configuration, the slurry powdered coal and binder (for example, kerosene, light oil, heavy oil, residual oil, vegetable oil) flowing through the pipe 1 are passed through the wire mesh stirring blades 3.
The mixture is mixed and stirred by Then, fine powdered coal adheres to and aggregates with relatively large particles of powdered coal and is granulated. At this time, the state of movement of the pulverized coal is as shown by the arrow in Figure 2, and it is difficult to use a static mixer that simply has a vane-shaped baffle plate in the conduit or an agitator that has ordinary vanes. The movement is different from that of the installed line mixer and other equipment. That is, the movement of the granulated coal and powdered coal particles within the tube 1 or rolling on the wall has an effective effect on advancing granulation. In this way, the granulated coal granulated in the straight portion 1a of the pipe 1 flows downstream through the gap a. Further, the granulated coal whose granulation progresses quickly falls between the stirring blades 3 and 3 quickly, thereby smoothing the granulation action of other powdered coal.

Next, another embodiment will be described based on FIGS. 3 and 4. In this embodiment, stirring blades 12 are provided in each of the curved pipe portions 11 provided at multiple stages in the middle of the slurry powder coal ring feed pipe. That is, the bent pipe portion 11 is formed into a horizontal pipe 11a, which extends obliquely upward from the horizontal pipe 11a, and has a blind portion 11c at the end thereof.
The bent tube 11b has a bending tube 11b.
A shaft body 13 having a plurality of stirring blades 12 is provided in 1b so as to rotatably penetrate the blind portion 11c, and the shaft body 1
3 is connected to a drive device (not shown). The bent pipe section 11 is successively provided in multiple stages, with the end of the horizontal pipe 11a of the other bent pipe section 11 connected to the connecting part 14 near the connection of the horizontal pipe 11a with the bent pipe 11b. ing.

According to such a configuration, the slurry-like pulverized coal moves like an arrow within the curved pipe section 11, and is mixed and stirred with the binder more efficiently, making it possible to efficiently granulate pulverized coal with a wide particle size range. .

Incidentally, the stirring blade is not limited to the one explained in the above embodiment, but may be a circular one as explained in the embodiment, which is attached obliquely to the shaft body. As shown in the figure, a plurality of blades 23 may be attached radially on both sides of each stirring blade 21 of the above embodiment and along the shaft body 22. Furthermore, although FIGS. 1 and 3 have been described as front views of the respective embodiments, they may also be considered as plan views.

As described above, according to the powdered coal granulation device of the present invention, the slurry powdered coal and the binder are mixed and stirred by the plurality of wire-mesh-like stirring blades provided in the pipe. Therefore, the pulverized coal can be moved differently from existing equipment, and pulverized coal with a wide range of particle sizes can be effectively granulated.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.
Fig. 2 is an enlarged view taken along arrow A-A in Fig. 1, Fig. 3 is a partially cutaway front view of another embodiment, Fig. 4 is a bottom view thereof, and Fig. 5 is another embodiment of the stirring blade. FIG. 1,11...Pipe, 2,13...Shaft body, 3,12
...Agitation blade.

Claims (1)

[Scope of utility model registration request] A rotatable shaft that coincides with the axis of the pipe and is connected to a drive device is provided in the pipe, and wire-mesh-like stirring blades are attached to multiple locations on the shaft, and the outer peripheral end of the stirring blade and the A pulverized coal granulation device characterized by having a gap between the inner peripheral surface of the pipe and the inner peripheral surface of the pipe.